Mesoporous silica supported water-stable perfluorobutylsulfonylimide and its catalytic applications in esterification
作者： Qiu-Hong Yang , Zhong-Hua Ma , Jing-Zhong Ma , Jin Nie
DOI: 10.1016/J.MICROMESO.2013.01.008
关键词:
摘要: Abstract A new water-stable perfluorobutylsulfonylimide-functionalized acidic silica ( PSFSI -MSMA 15 /SiO 2 ) has been successfully prepared by copolymerization of 4-styrenesulfonyl(perfluorobutylsulfonyl)imide 1 with 3-(trimethoxysilyl)propyl methacrylate (MSMA) followed condensation tetraethyl orthosilicate under sol–gel conditions. N isotherm and TEM image showed that the material high BET surface areas, large pore volumes, abundant mesoporosity. Acid–base titration analysis gave acid loading capacities 0.66 mmol/g. The TG curves XPS spectra exhibited good thermal stability + leakage observed) material. had acid-strength stronger than HZSM-5 determined solid state 13 C NMR spectrum combined acetone-2- molecular probe technology. performed effective in direct esterification carboxylic acids alcohols, recycling at least seven run without obvious loss activity reaction temperature. catalyst’s towards leaching effects composition structure on catalytic are discussed.
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